Finding the Fourth Proportional to 139,404.83, 209,106.86 and 39,565.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,404.83 : 209,106.86 = 39,565.12 : x
2. Step 2: Convert to fraction form
   139,404.83/209,106.86 = 39,565.12/x
3. Step 3: Cross multiply
   139,404.83x = 209,106.86 × 39,565.12
4. Step 4: Simplify right side
   139,404.83x = 8,273,337,436.50
5. Step 5: Solve for x
   x = 8,273,337,436.50/139,404.83
6. Step 6: Final answer
   x = 59,347.57